Removed the getKind method from the starter implementation

exercises/triangle/src/main/java/Triangle.java

@@ -4,8 +4,4 @@ class Triangle {
         throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
     }
 
-    TriangleKind getKind() {
-        throw new UnsupportedOperationException("Delete this statement and write your own implementation.");
-    }
-
 }